zkoss/zk

#!/bin/bash
#
#{{IS_NOTE
#
# Authors: Tom M. Yeh
# Contributors:
# Create Date: 2001/3/30 05:46PM
# Purpose: Generate the current time
# Description:
#    The resolution is hour (so the same JAR file won't be re-zipped
#    in the same hour if nothing changed).
# History:
#    
#}}IS_NOTE
#
# Copyright (C) 2007 Potix Corporation. All Rights Reserved.
#
#{{IS_RIGHT
#    This program is distributed under GPL Version 3.0 in the hope that
#    it will be useful, but WITHOUT ANY WARRANTY.
#}}IS_RIGHT
#

function showhelp
{
    echo "gentime - generate the current time (up to hour)"
    echo "Copyright (C) 2007 Potix Corporation. All Rights Reserved."
    echo
    echo "Usage:"
    echo "  gentme [-h] [dstfl]"
    echo
    echo "dstfl"
    echo "    The destination file. If omitted, the time is generated to stdout."
    echo "    If the content of the destination file is the same, the file"
    echo "    won't be changed."
    echo
    echo "Note: if the directory doesn't exist, nothing is generated"
}

if [ "$1" = "--help" ] || [ "$1" = "-h" ] ; then
    showhelp
    exit 0
fi

stamp=$(date +%Y%m%d%H)

if [ "$1" = "" ] ; then
    echo $stamp
    exit 0
fi

dstfl=$1
if [ -f $dstfl ] && [ "$(cat $dstfl)" = "$stamp" ] ; then
    exit 0
fi

echo Generate build identifier: $stamp
mkdir -p "${dstfl%/*}"
echo $stamp > "$dstfl"